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Use a bytes channel in BufferData

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This means we don't need to copy the input ArrayBuffer at all on the DOM side.
This commit is contained in:
Anthony Ramine 2018-09-07 11:10:44 +02:00
parent e37856a855
commit 9f924013bc
4 changed files with 37 additions and 22 deletions
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37
components/script/dom/webglrenderingcontext.rs
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@ -52,6 +52,7 @@ use dom::window::Window;
use dom_struct::dom_struct;
use euclid::Size2D;
use half::f16;
use ipc_channel::ipc;
use js::jsapi::{JSContext, JSObject, Type};
use js::jsval::{BooleanValue, DoubleValue, Int32Value, UInt32Value, JSVal};
use js::jsval::{ObjectValue, NullValue, UndefinedValue};
@ -1846,21 +1847,25 @@ impl WebGLRenderingContextMethods for WebGLRenderingContext {
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.5
#[allow(unsafe_code)]
fn BufferData(
&self,
target: u32,
data: Option<ArrayBufferViewOrArrayBuffer>,
usage: u32,
) {
let data = match data {
Some(ArrayBufferViewOrArrayBuffer::ArrayBuffer(data)) => data.to_vec(),
Some(ArrayBufferViewOrArrayBuffer::ArrayBufferView(data)) => data.to_vec(),
None => return self.webgl_error(InvalidValue),
};
let data = handle_potential_webgl_error!(self, data.ok_or(InvalidValue), return);
let bound_buffer = handle_potential_webgl_error!(self, self.bound_buffer(target), return);
let bound_buffer = handle_potential_webgl_error!(self, bound_buffer.ok_or(InvalidOperation), return);
let data = unsafe {
// Safe because we don't do anything with JS until the end of the method.
match data {
ArrayBufferViewOrArrayBuffer::ArrayBuffer(ref data) => data.as_slice(),
ArrayBufferViewOrArrayBuffer::ArrayBufferView(ref data) => data.as_slice(),
}
};
handle_potential_webgl_error!(self, bound_buffer.buffer_data(data, usage));
}
@ -1876,17 +1881,12 @@ impl WebGLRenderingContextMethods for WebGLRenderingContext {
// FIXME: Allocating a buffer based on user-requested size is
// not great, but we don't have a fallible allocation to try.
let data = vec![0u8; size as usize];
handle_potential_webgl_error!(self, bound_buffer.buffer_data(data, usage));
handle_potential_webgl_error!(self, bound_buffer.buffer_data(&data, usage));
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.5
#[allow(unsafe_code)]
fn BufferSubData(&self, target: u32, offset: i64, data: ArrayBufferViewOrArrayBuffer) {
let data_vec = match data {
// Typed array is rooted, so we can safely temporarily retrieve its slice
ArrayBufferViewOrArrayBuffer::ArrayBuffer(inner) => inner.to_vec(),
ArrayBufferViewOrArrayBuffer::ArrayBufferView(inner) => inner.to_vec(),
};
let bound_buffer = handle_potential_webgl_error!(self, self.bound_buffer(target), return);
let bound_buffer = handle_potential_webgl_error!(self, bound_buffer.ok_or(InvalidOperation), return);
@ -1894,14 +1894,23 @@ impl WebGLRenderingContextMethods for WebGLRenderingContext {
return self.webgl_error(InvalidValue);
}
if (offset as usize) + data_vec.len() > bound_buffer.capacity() {
let data = unsafe {
// Safe because we don't do anything with JS until the end of the method.
match data {
ArrayBufferViewOrArrayBuffer::ArrayBuffer(ref data) => data.as_slice(),
ArrayBufferViewOrArrayBuffer::ArrayBufferView(ref data) => data.as_slice(),
}
};
if (offset as u64) + data.len() as u64 > bound_buffer.capacity() as u64 {
return self.webgl_error(InvalidValue);
}
let (sender, receiver) = ipc::bytes_channel().unwrap();
self.send_command(WebGLCommand::BufferSubData(
target,
offset as isize,
data_vec.into(),
receiver,
));
sender.send(data).unwrap();
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.8